Sewer-mold.



No. 883,194. PATENTBD MAR. s1, 1903.

K. 0. GUTHRIB. 4 l

SEWER MOLD.

APPLICATION FILED NOV.19,1907.

3 SHEETS-SHEET l. K

INVENTUR ATTORNEY No. 883,194. PATENTED MAR. 31, 1908.

K. 0. GUTHRIE.

SEWER MOLD. APPLIGATION FILED Nov.19.i9o7. i

3V SHEETS-SHEET 2.

N0. 883,194. PATENTED MAR. 3l, 1908.

K. 0. GUTHRIE.

SEWER MOLD.

`APPLIGAJEION FILED Nov. 19.1907.

3 SHEETS-SHEET 3.

WITNES 1 f jf @WDM/1^.

UNITED sTATEs PATENT oEEIcE.

I KEITH O. GUIHRIE, OF BROOKLYN, NEW YORK.

V SEWER-Mom).

l, No. 883,194.

To all @from it may` concern:l

l' Be it known that I, KEITH O. GU'IHRIE, a citizenl of the United States, residing at `Brooklyn,yin the county of Kings and State of N ew York, have invented certain new and useful Improvements inSewer-Molds; and I l throu hout.

fao

f ing the parts of the mold material before `are assembled.

and an independent parti-cylindrical main In t e drawings, Figure'l is a cross section of a sewer in process of construction, and in which .my improved moldsV are employed. Fig. 2 illustrates a longitudinal portion of a mold, the parts being `broken vaway to dis close the interior construction. F1g. 3. is a ydetail view ofgthat portion of the interior constructionwhich lies atthe to' of the mold.

Fig. 4 is a detail of a modifie form of the mold material in section. Fig. 5 is a similar view of another modification. f 'F1g.- 6 1llustrates an available means for. collapsing the mold.. Fig. 7 illustrates a modified means for supporting the main mold sectioniin. place, and Figs. 8, 9 and 10 are detail views of the modification illustrated in Fig. 4 showtheyl The interior cylindrical mold of Fig. 1 is made up of a s allow invert supplemental section 1 laid to form theybottom of the mold,

section 2 lwhich extends over considerably more than half of the interior of the cylinder and together with the supplemental invert section 1 forms the completed mold.

The invert section of the mold is made u of an external flexible face-plate 3 which 1s supported and reinforced by a metallic struc;

ture consisting, in the particular embodiment illustrated, of a metallic sheet bent in the manner shown to form flattened portions *A which are riveted or otherwise secured to the flexible face plate, and diagonal reaches extending to similar flattened portions which are secured to a strengthening bar or chord 4 Specification of Letters Patent.`

Application led November .19, 1907. Serial No. 402,903.

drawings in Awhich like referlence numeras are applied to like parts Patented March 31,. 1908.

bent to thecurvature of the mold. The whole forms a truss structure in which the flexible face plate is one chord, the bent metallic sheet corresponds to the web portion, andl the stifliening member 4 constitutes the other chord. It will be observed that the face late and the supporting and reinforcing meta lic structure are themselves flexible and vonly become rigid when the stiffening member is secured in place, and that the diagonally extending reaches act, in the direction of the length of the Inold, as plate girders. The whole forms a light, ,but extremely rigid, structure for forming the mold wall and at the same time a structure which lends itself readily to the formation of different curves,

as will be more fully described hereinafter. The independent main section of the Inold is similarly constructed of a flexible face plate v5, su ported and reinforced by an arched meta ic structure, similar to that of the invert section, stiifencd by thestiil'ening meinbers 6 and 7, but itextends over a considerably greater portion of the cylinder than does the invert section. l

The main arched section of the mold may be secured to the supplemental section in the manner shown in Fig. 1 in which the sup orting and reinforcing metallic portions o the `two sections 1 and 2 terminate in flanges 3() .and 31, which are temporarily bolted together when the mold is in place, and the stifteniigg member 4 has the hinged extensions 32 a apted to be temporarily bolted to the ends of the stiffening members 6 and 7. When the mold is to be collapsedthese temporary bolts are removed. For the pur ose of collapsin this main section of the mold) th ere are secure f to the inner surfaces thereof near the lower ed es the ro ectin )erforated studs 9 and 9 g P l gl when the mo d is to be collapsed the turnbuckle 1() is fixed in the position shown by passin hooks 12 at the end of the ropes 11 lthrong the perforations in the studs 9 and the turnbuckle is then screwed up to collapse the mold. To render the mold thus collapsible, the stiffening member must in effect be broken at the point of bend, and to this end the members 6 and 7 are rovided with hinge members 13 and 14 whic when the mold is l in position, are locked together by the pin 15 when it is desired to collapse the mold, are unlocked by knocking out that pin, whereupon on thetightening up of the turnbuckle 10 the o uter flexible plate and the supporting and reinforcing metallic structure bend, while the stiifening member breaks at the hinge, thus causing the mold to fall away from the interior of the sewer structure. It will be observed that while the sewer is being formed the mold comprises merely a cylindrical wall of very inconsiderable thickness as compared with the total diameter of the inside of the sewer and it is, therefore, possible to remove the lower section, and the collapsed upper section, of the mold used to form a finished portion of the sewer, throu h an erected mold forming a portion of t e sewer in which the cement has not yet been ut in place or has not yet completely set.

t is thus possible with my improved mold to carry out a continuous cycle of operations without interrupting the process whilethe cement sets. That is to say, a sewer may be built by supplying, let us say, a sufficient amountof mold to cover tlie-work for five days without any interruption of the work. Then the first days section of mold is set up and filled with the concrete and then the next days section, and so on until at the end of the fourth or fifth day the first days section will have set, whereupon the mold may be removed from the interior of that section and /run through the sections of mold set up on the following days, and then set -up again for the sixth days work, and so on.

For the pur ose of carrying and handling the main mol section after it is collapsed I prefer to em loy a carriage like that shown in Fig. 1, in w ich the carriage 8 made up of the braced upright and transverse members, as shown, and having the rollers 33, supports the carrying frame made up of the longitudinally extending members 34 and 35 so laced and shaped as to su port the main ino d section when'it is col apsed into the position shown in dotted lines. The member 35 rests on supporting blocks 36 and should preferably be blocked up to within about one inch of the under surface of the mold section when in place, so that when the section is first collapsed it will be caught by the niember '35 without injury. Afterward the blocks should be knocked out to bring the member 35 down to the position shown in Fig. 1, when the carriage with the mold section carried thereby may be rolled through the subsequently set up sections to a new position of use.

It is sometimes desirable to set up an entire cylindrical mold, as shown in Fig. 1, suitably supporting itin position, and then fill-in the concrete about the entire mold in one operation. Sometimes, however, it is preferable to first form a shallow trough of concrete, using for that purpose suitable mold sections like the invert sections 1, for example, but of slightly Greater extent, and filling in the concrete to fiorm the lower portion of the sewer, as shown in Fig. 7. The

invert mold sections may then be removed and invert brace plates laid in the trough to support the ends, of the main mold section. Such a brace plate, made of reinforced material of the kind hereinbefore described, is shown at 37. Such brace plates are made a foot or so in width and are laid at intervals in the trough, and their ends take under the edges of the main arched mold section to support it. As a su pleinental orvalternative means for hol ing the main arched mold section in lac-e I` may employ the tie wires or rods 23 having one end embedded in the concrete, and the free end passing through the wall ofthe main' mold section and temporarily secured by a wedge or pin 38. v

In Fig. 1 I have shown further archshaped sections 17 and 18 ofA mold forms, of a construction similar to that already described, but having a concave face instead of a convex face, and sup orted a sufficient distance above the cylindrical mold by the braces 19 extending from the structure which is ordinarily erected in the cut in which the sewer is formed. The purpose of these additional sections, as will readily be understood', is to form a curved upper surface for the cement structure of the sewer.

In. Fig. 6 I have shown a lever for collapsing the Amold instead of the turnbuckle arrangement shown in Fig. 1. In this figure the lever 20 has the rods 21 vand 22 connected to it in the manner shown and these rods terminate in hooks such as 12, which may be' placed in the perforations in the studs 9 and then the lever moved to the left, as illustrated in-Fig. 6, to collapse 'the mold.

In Figs. 4, 8, 9 and 10 I have illustrated a modified construction of adjustable panel or mold section in which the face plate' 24 is supported by al bent metallic structure which is similar to that already described, excepting that the flattened portions which are not attached to the face plate` instead of being attached directly to a stiifening meniber, as shown in Figs. 1 and 2, for example,

have attached-to them-the small foot plates 25 by countersunk rivets, or other appro riate means which will give a flat under sui ace to these lates. These plates have bolt holes suitably arranged therein and when it is desired to form a panel or nioldsection of a given curvature a stifl'ening member such' as '26 or 27,fshown'in Figs. 9 and 10 is selected or manufactured having corresponding bolt holes so spaced with relation to each other that when these stiffenin f members are bolted to the plates 25 the esired curvature shall be given to the face plate 24. It will `be understood that by this means any degree of concave or convex curvature may be given to the face plate and that a single plate may be used for different curvatures y changing the stiffeningmember. The

panels so formed maybe closed at their lateral edges by bending down the face plate and su porting truss-structure as shown.

In 5 I have shown a modification' applicable to any of the Wall structures above described, the objectief which is to add stiffness to thev wall for particularly severe work. To this end wooden blocks 28 may be inserted Within the wall structure so as to fill the spaces'between thel face plate and stifening memberand the diagonally extending reaches.

For ordinary service prefer the specific embodiment of my invention in which the supporting and reinforcing metallic structure comprises `a bent metal plate continu- .f

ous in a longitudinal direction, and Ithe stiflening members are in the form of ribs extending around the interior cylindrical surface and secured to the supporting Yand reinforcing metallic structure, as `illustrated ink may be v consolidated into a single interiorl plate instead of the scribed.

What I claim is: l. In a mold for tubular ribs, as shown and decocrete structures, a collapsible mold section comprising a flexible face-plate supported and reinforced by a llexible nation with a divided stifl'ening chord attached to the intermediate web-section to form the whole into a continuous truss structurepxcept at the point of division of the chord, and means for temporarily uniting the parts of the vdivided stifl'ening chord to complete the continuity of the truss structure throughout, whereby when the parts of the stitl'ening chords 'are united the truss structure is complete and when the said parts are not united the mold section may be ent at the point of: division and thereby collapsed, substantially as described.

2. In a mold for tubulanconcrete structures, a collapsible mold sectilon comprising a flexible face-plate supported' and reinforced by a flexible web-section of thin metal bent to form diagonally extending reaches and intermediate connecting portions, alternate connecting portions being secured to' the face-plate, in combination with a-divided stifl'cning/chord secured to the other alternate connecting portions to form the whole into a continuous truss structure except at the point of division of the chord, and means for temporarily uniting the parts of the divided stifl'cning chord to complete the continuity of the truss structure throughout, whereby when the parts of thel stiflening chord are united the truss structure is comn'ietallie Web-section, in combiplete and when the said parts are not united the mold-section may be bent at the point of division and thereby collapsed, substantially as described. v

3. In a mold for tubular concrete structures, a main collapsible mold-section comprising a flexible face-plate supported and reinforced by a flexible metallic web-section having a divided stifi'ening chord forming the Whole into a continuous truss structure except at the point of division of the chord,

the parts complete throughand means for temporarily uniting of the'divided stifl'ening ,chord to the continuity ofthe truss structure vvout, in combination with a supplemental invert mold section adapted to support the edgesv of the main mold section and com lete the mold, whereby there yis formed a ight `tubular mold having an open interior through which other collapsed mold-sections may be carried, substantially as described.

4.' In a mold for tubular concrete structures, an upper arched mold section coniprising a flexible face-plate supported and reinforced by a flexible metallic truss Websection of thin metal bent to form diagonally extending reaches and intermediate connecting portions, alternate intermediate portions being secured to the face-plate, and a stillening chord attached to the other alternate intermediate portions, to form the Whole into i an arched truss structure, in combination with means for'supporting the lower edges of the said section in an invert mold, Whereby there is formed. a tubular mold having an open interior through which other collapsed mold sections may .as described. 4

5. In a mold for tubular concrete structures, an upper arched mold section com- -prising a flexible face-plate supported and reinforced by a flexible metallic truss Websection of thin metal bent to form diagonally extending reaches and intermediate connect-` ing portions, alternate intermediate portions being secured to the face-plate, and a stiflening chord attached to the other alternate intermediate ortions, to form the whole into an arched) truss structure, combination `with a supplemental invert `member adapted to support the lower edges of the upper mold section, ywhereby there is formed a tubular mold having an open interior through which other collapsed mold sections may be carried, substantially as described.

6. In a mold for tubular concrete structures, an upper main mold section extending over considerably more than half the mold and Vcomprising a flexible face plate supported and reinforced by an arched metallic websection made up of thin metal bent to form diagonal cireuniferentially extending reaches and intermediate connecting portions, alternate connecting portions being secured to the face-plate, and circumferentially extending be carried, Substantially stiffening ribs, secured to the other alternate connecting portions, in combination with a supplemental invert mold section, the abutting edges of the mold sections having engaging flanges adapted to be secured together, whereby there is formed a self-supporting tubular mold through which the collapsed sections of previously set-up moldsmay be carried; .substantially as described.

7. ln a mold for tubular concrete structures, an upper main mold section extending over considerably more than half the tube and comprising a flexible face plate supported and reinforced by sheet metal extending in the direction of the axis of the mold section and bent to form' diagonal reaches extending circumferentially of the mold section and intermediate nate connecting portions being secured to the face plate, a series of two-part stiffening ribs extending circumferentially of the mold section and secured to the other alternate connecting portions and terminating near the upper central line of the mold section, and means for temporarily connecting the ends of the two part ribs, in combination with a supplemental invert mold section having a flexible face plate supported and reinforced by a like bent sheet-metal structure and continuous circumferentially extending stiffening ribs, the abutting edges of the mold sections having engaging Aflanges adapted to be secured together, and means for connecting the two-part ribs of the main section tothe ribs of the invert section, whereby there is formed a selfsupporting tubular mold through which the collapsed sections of previously set-up molds may be carried; substantially as described.

8. A mold section of the character described comprising a flexible metallic face'- plate supported and reinforced by a flexible web-section of thin metal bent to form diagonally extending reaches and intermediate connecting portions, alternate connecting connecting portions, altery portions being secured to the face-plate, in combination with a series of flat plates, having bolt holes, secured to the other alternate connecting portions, and a stiffening flange, having properly spaced bolt holes detachably secured to the 'flat plates, whereby the stiffening flange Inay be removed and replaced by a similar flange having holes to change the curvature of the panel; substantially as described.

'9. A mold section of the character described, comprising a flexible metallic face plate supported and reinforced by a flexible web-section of thin metal bent to form diagonally extending reaches andintermediate connecting portions, alternating connecting portions being secured to the face plate, in'

combination with a stiflening flange secured to the other alternate connecting portions, and blocks mterposed betweenl the web-secdiii'erently spaced bolt tion and the flanges and face plate; substantially as described 10. A mold section of the character described, comprising a fiexiblemetallic face plate supported and reinforced by a flexible Web-section of thin metal bcnt to form diagonally extending reaches and intermediate connecting portions, alternate connecting portions being secured to the face plate, in combination with a stifl'cning flange and means for detachably connecting the lsti'fl'ening flange to the other alternate connecting portions in such manner as to impose a curvature upon the face plate and supporting websection, whereby the sti'flening flange may be removed and replaced by a similar flange having different-ly arranged attaching means to change the curvature of the panel, substantially as described.

' In testimony whereof l affix my signature, in presence of two witnesses.

KEITH O. GUTUR'IE. lVitnesses:

WILLIAM H. DAVIS, L. B. PENFIELD. 

